Improvement in holdback-irons



S. 'E. WINSLOW.

HOLDBACK-IRONS. No. 193,839'. I Patented Aug. 7,1877.

WITNESSES 7 INVENTOR,

ATTORN EY.

N-PEI'ERS, PHOTO-LITNDGRAPNER, WASHINGTON, D. C.

. UNITED lMPROVEMENT IN HOLDBACK-IRONS.

Specification forming part of Letters Patent No. 133,839, dated August7', 1877; application filed June 7, 1877.

To all whom it may concern Be it known that I, SEwELL E. WINSLOW, ofAugusta, in the county of Kennebec and State of Maine, have inventedcertain new and useful Improvements in Holdback-Irons; and I do herebydeclare that the following is a full,

clear, and exact description thereof, which will which will hold thestraps tightly enough to prevent their slipping out in use, and yet willallow their being readily withdrawn upon the application of slightforce, so that when the traces are detached the holdbacks will no longerconfine the animal to the vehicle.

The accompanying drawing shows the nature of my invention.

The iron is secured to the thill by means of the screw-threadedprojection A. The bracketed part B is cast hollow, and a straightspring, 0, is introduced with its free end bearing against the shoulderof the movable arm D. The arm D is pivoted at E, and the rear end of thearm, when it bears against the the point of the arm turned down, it willremain so, and hold the strap until some force is applied to withdrawit, and when the point is raised, as shown in the dotted lines of thedrawing, it will stay so, and permit the free introduction of the strap.

The action of this device is as follows: The point of the arm D israised to a horizontal position, where it is held by the pressure of thespring 0 against its square face as long as may be desired. When theloop of the holdback-strap is inserted. the arm is turned down, and thespring holds it securely, and the holdback cannot be readily withdrawnexcept by intention. 1

I am aware that holdback-irons with the arms or points more or lesselastic, to permit the holdbaek-strnp being slipped under them, havebeen used before; but

Having thus described my invention. what I claim as new, and desire tosecure by Letters Patent, is l A holdback-iron for the thills ofcarriages, having the threaded projection A. by which itis secured tothe thill, in combination with the spring 0 and the p1voted arm D,having its rear end with faces nearly at right angles to each other,against which the spring 0 presses, whereby the arm D is kept closedwhen turned down, and open when turned up, substantially as described.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

SEWELL E. WINSLOW.

